Make BrowserMessageFilter support dispatching messages on different threads.

chrome/browser/appcache/appcache_dispatcher_host.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_APPCACHE_APPCACHE_DISPATCHER_HOST_H_
 #define CHROME_BROWSER_APPCACHE_APPCACHE_DISPATCHER_HOST_H_
 #pragma once
 
 #include <vector>
 
 #include "base/process.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/appcache/appcache_frontend_proxy.h"
-#include "chrome/browser/browser_io_message_filter.h"
+#include "chrome/browser/browser_message_filter.h"
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 #include "ipc/ipc_message.h"
 #include "webkit/appcache/appcache_backend_impl.h"
 
 class ChromeAppCacheService;
 class URLRequestContext;
 class URLRequestContextGetter;
 
 // Handles appcache related messages sent to the main browser process from
 // its child processes. There is a distinct host for each child process.
 // Messages are handled on the IO thread. The ResourceMessageFilter and
 // WorkerProcessHost create an instance and delegates calls to it.
-class AppCacheDispatcherHost : public BrowserIOMessageFilter {
+class AppCacheDispatcherHost : public BrowserMessageFilter {
  public:
   // Constructor for use on the IO thread.
   AppCacheDispatcherHost(URLRequestContext* request_context,
                          int process_id);
 
   // Constructor for use on the UI thread.
   AppCacheDispatcherHost(URLRequestContextGetter* request_context_getter,
                          int process_id);
 
   ~AppCacheDispatcherHost();
 
   // BrowserIOMessageFilter implementation
-  virtual bool OnMessageReceived(const IPC::Message& message);
   virtual void OnChannelConnected(int32 peer_pid);
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok);
 
  private:
   // IPC message handlers
   void OnRegisterHost(int host_id);
   void OnUnregisterHost(int host_id);
   void OnSelectCache(int host_id, const GURL& document_url,
                      int64 cache_document_was_loaded_from,
                      const GURL& opt_manifest_url);
   void OnSelectCacheForWorker(int host_id, int parent_process_id,
                               int parent_host_id);
@@ skipping 28 matching lines @@
   scoped_ptr<appcache::SwapCacheCallback> swap_cache_callback_;
   scoped_ptr<IPC::Message> pending_reply_msg_;
 
   // The corresponding ChildProcessHost object's id().
   int process_id_;
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheDispatcherHost);
 };
 
 #endif  // CHROME_BROWSER_APPCACHE_APPCACHE_DISPATCHER_HOST_H_